Method for preparing bis(fluorosulfonyl)imide acid and salts thereof
AssigneeRhodia Operations
InventorOlivier Buisine
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Abstract
The invention relates to a method for preparing bis(fluorosulfonyl)imide acid, comprising: the reaction of sulphamic acid or one of the salts thereof with a halogenosulfuric acid and at least one fluorinating agent selected from SOF2, F—SO2—F and SF4, and the subsequent recovery of bis(fluorosulfonyl)imide acid. The invention also relates to a method for producing salts of bis(fluorosulfonyl)imide from the bis(fluorosulfonyl)imide acid thus produced.
Claims15
A process for preparing bis(fluorosulfonyl)imide acid of formula F—SO2—NH—SO2—F, the process comprising the reaction of sulfamic acid or a salt thereof with at least one halosulfuric acid and at least one fluorinating agent selected from the group consisting of SOF2, F—SO2—F and SF4, then the recovery of the bis(fluorosulfonyl)imide acid.
Dependencies are inferred from the claim text.